The Galleria d'Arte Moderna Ricci Oddi houses a substantial collection of Italian art from the 19th and early 20th centuries, assembled by Giuseppe Ricci Oddi and donated to the city in 1931 along with the purpose-built gallery building. The collection is strong in the Symbolist, Divisionist, and post-Impressionist tendencies that characterized Italian painting of the Belle Époque, with works by Segantini, Pellizza da Volpedo, Boldini, and others.
The building itself is a calm, early-20th-century exhibition space, well-maintained and not too large — you can see everything in about two hours. The collection isn't as well known as it deserves to be. The Klimt (once lost, now returned) is one of only four works by the Austrian painter in Italian public collections.